Silalactones and methods for their preparation and use

Details Silalactones and methods for their preparation and use Silalactones and methods for their preparation and use

C - Chemistry, Metallurgy

07

F

402/25, 260/442.

C07F 7/08 (2006.01) C07F 7/18 (2006.01) C08G 77/14 (2006.01)

Patent

CA 1246091

SILALACTONES AND METHODS FOR THEIR PREPARATION AND USE Abstract Carboxyalkyl-substituted organopolysiloxanes are prepared by hydrolysis of a silalactone composition having the formula Image where n has an average value greater than zero, R and Q are hydrocarbon and X is Cl or Br. Silicon-containing compounds having the formula RaZbSiO(4-a-b)/2, where Z is a hydrolyzable radical, can be cohydrolyzed therewith. The novel silalactone composition is prepared by gently heating a mixture of an ester having the formula X2R SiQCO2R' and a halide salt catalyst, such as tetrabutylammonium bromide.

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